Rombix consists of the 16 tiles formed with four sizes of rhombs, as singles and concave pairs. (See its basic format in the "Essential Polyforms" section.) The 16-sided "circle" hovers like a globe in its expanse of border. This mixed-media version of Alan Schoen's patented concept alternates bands of dark and blond wood and tinted transparent acrylics, in four variations. The felt-backed handcrafted tray has a beautiful maple frame, 12½" square, and a clear cover plate makes it ready to stand on its easel or hang on a wall. Easel included. This set makes a fine gift for executives and math buffs, and is an extraordinary pleasure to play with. $150

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Deluxe TRIFOLIATM

A hexagon of alternating wood and tinted transparent acrylic tiles evokes a flock of birds in flight. Kate Jones' 24 graceful triangles are actually every permutation of four differently shaped edges. (See their basic format in the "Edgematching" section.) Felt-backed 12½" maple-framed tray with clear cover plate is ready to hang or set on its easel. Easel included. Please indicate your preferred choice of transparent color to accompany the wood pieces. $150

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Deluxe SEXTILLIONSTM

The 36 hexominoes have twelve special pieces singled out by contrasting wood/acrylic. (See their basic format in the "Polyominoes" section.) Felt-backed 12½" maple-framed tray with clear cover plate is ready for play or display. The tray's flip-side is also a play surface. Game grid and easel included. Please indicate your preferred choice of transparent color to accompany the wood pieces. $150

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Deluxe SUPER ROUNDOMINOES®

The ten curvaceous shapes of 1 through 4 "rounds" and "bridges" are styled with three tones of wood and your choice of three colors of transparent acrylics, in a broad scalloped border. (See their basic format in the "Essential Polyforms" section.) Reversible 12½" maple-framed tray has a felt-lined play surface. A separate 8½" game grid is included. A clear cover plate makes it ready to hang on the wall or set on its easel. It looks especially effective when placed diagonally. $150